Inverted Channels North of Juventae Chasma

This image shows raised ridges on a plain to the north of Juventae Chasma, a canyonthat is part of the Valles Marineris system. Several examples of raised features havebeen identi!ed on the plains nearby; they have been explained as former streamchannels that are now preserved in inverted relief. On Earth, inverted relief occurswhen former depressions become elevated because materials that !ll the depressionsare more resistant to erosion than the surrounding terrain.